function getXmlHttp()
{
	var xmlhttp;
	try 
	{
		xmlhttp = new ActiveXObject( "Msxml2.XMLHTTP" );
	} 
	catch (e) 
	{
		try 
		{
			xmlhttp = new ActiveXObject( "Microsoft.XMLHTTP" );
		} 
		catch (E) 
		{
			xmlhttp = false;
		}
	}
	if ( !xmlhttp && typeof XMLHttpRequest != 'undefined' ) 
	{
		xmlhttp = new XMLHttpRequest();
	}
	return xmlhttp;
}